<template>
    <div>
        <el-upload
                :action="uploadUrl"
                :before-upload="handleBeforeUpload"
                :on-success="handleUploadSuccess"
                :on-error="handleUploadError"
                name="file"
                :show-file-list="false"
                :headers="headers"
                class="editor-img-uploader"
                v-if="type == 'url'"
        >
            <i ref="uploadRef" class="editor-img-uploader"></i>
        </el-upload>
    </div>
    <div class="editor">
        <quill-editor
                ref="quillEditorRef"
                v-model:content="content"
                contentType="html"
                @textChange="(e) => $emit('update:modelValue', content)"
                :options="options"
                :style="styles"
        />
    </div>
</template>

<script setup>
    import {QuillEditor} from "@vueup/vue-quill";
    import "@vueup/vue-quill/dist/vue-quill.snow.css";
    import {getToken} from "@/utils/auth";

    const {proxy} = getCurrentInstance();

    const quillEditorRef = ref();
    const uploadUrl = ref(import.meta.env.VITE_APP_BASE_API + "/common/upload"); // 上传的图片服务器地址
    const headers = ref({
        Authorization: "Bearer " + getToken()
    });

    const props = defineProps({
        /* 编辑器的内容 */
        modelValue: {
            type: String,
        },
        /* 高度 */
        height: {
            type: Number,
            default: null,
        },
        /* 最小高度 */
        minHeight: {
            type: Number,
            default: null,
        },
        /* 只读 */
        readOnly: {
            type: Boolean,
            default: false,
        },
        /* 上传文件大小限制(MB) */
        fileSize: {
            type: Number,
            default: 5,
        },
        /* 类型（base64格式、url格式） */
        type: {
            type: String,
            default: "url",
        }
    });

    const options = ref({
        theme: "snow",
        bounds: document.body,
        debug: "warn",
        modules: {
            // 工具栏配置
            toolbar: [
                ["bold", "italic", "underline", "strike"],      // 加粗 斜体 下划线 删除线
                ["blockquote", "code-block"],                   // 引用  代码块
                [{list: "ordered"}, {list: "bullet"}],      // 有序、无序列表
                [{indent: "-1"}, {indent: "+1"}],           // 缩进
                [{size: ["small", false, "large", "huge"]}],  // 字体大小
                [{header: [1, 2, 3, 4, 5, 6, false]}],        // 标题
                [{color: []}, {background: []}],            // 字体颜色、字体背景颜色
                [{align: []}],                                // 对齐方式
                ["clean"],                                      // 清除文本格式
                ["link", "image", "video"]                      // 链接、图片、视频
            ],
        },
        placeholder: "请输入内容",
        readOnly: props.readOnly
    });

    const styles = computed(() => {
        let style = {};
        if (props.minHeight) {
            style.minHeight = `${props.minHeight}px`;
        }
        if (props.height) {
            style.height = `${props.height}px`;
        }
        return style;
    });

    const content = ref("");
    watch(() => props.modelValue, (v) => {
        if (v !== content.value) {
            content.value = v === undefined ? "<p></p>" : v;
        }
    }, {immediate: true});

    // 如果设置了上传地址则自定义图片上传事件
    onMounted(() => {
        if (props.type == 'url') {
            let quill = quillEditorRef.value.getQuill();
            let toolbar = quill.getModule("toolbar");
            toolbar.addHandler("image", (value) => {
                if (value) {
                    proxy.$refs.uploadRef.click();
                } else {
                    quill.format("image", false);
                }
            });
        }
    });

    // 上传前校检格式和大小
    function handleBeforeUpload(file) {
        const type = ["image/jpeg", "image/jpg", "image/png", "image/svg"];
        const isJPG = type.includes(file.type);
        //检验文件格式
        if (!isJPG) {
            proxy.$modal.msgError(`图片格式错误!`);
            return false;
        }
        // 校检文件大小
        if (props.fileSize) {
            const isLt = file.size / 1024 / 1024 < props.fileSize;
            if (!isLt) {
                proxy.$modal.msgError(`上传文件大小不能超过 ${props.fileSize} MB!`);
                return false;
            }
        }
        return true;
    }

    // 上传成功处理
    function handleUploadSuccess(res, file) {
        // 如果上传成功
        if (res.code == 200) {
            // 获取富文本实例
            let quill = toRaw(quillEditorRef.value).getQuill();
            // 获取光标位置
            let length = quill.selection.savedRange.index;
            // 插入图片，res.url为服务器返回的图片链接地址
            quill.insertEmbed(length, "image", import.meta.env.VITE_APP_BASE_API + res.fileName);
            // 调整光标到最后
            quill.setSelection(length + 1);
        } else {
            proxy.$modal.msgError("图片插入失败");
        }
    }

    // 上传失败处理
    function handleUploadError() {
        proxy.$modal.msgError("图片插入失败");
    }
</script>

<style>
    .editor-img-uploader {
        display: none;
    }

    .editor, .ql-toolbar {
        white-space: pre-wrap !important;
        line-height: normal !important;
    }

    .quill-img {
        display: none;
    }

    .ql-snow .ql-tooltip[data-mode="link"]::before {
        content: "请输入链接地址:";
    }

    .ql-snow .ql-tooltip.ql-editing a.ql-action::after {
        border-right: 0px;
        content: "保存";
        padding-right: 0px;
    }

    .ql-snow .ql-tooltip[data-mode="video"]::before {
        content: "请输入视频地址:";
    }

    .ql-snow .ql-picker.ql-size .ql-picker-label::before,
    .ql-snow .ql-picker.ql-size .ql-picker-item::before {
        content: "14px";
    }

    .ql-snow .ql-picker.ql-size .ql-picker-label[data-value="small"]::before,
    .ql-snow .ql-picker.ql-size .ql-picker-item[data-value="small"]::before {
        content: "10px";
    }

    .ql-snow .ql-picker.ql-size .ql-picker-label[data-value="large"]::before,
    .ql-snow .ql-picker.ql-size .ql-picker-item[data-value="large"]::before {
        content: "18px";
    }

    .ql-snow .ql-picker.ql-size .ql-picker-label[data-value="huge"]::before,
    .ql-snow .ql-picker.ql-size .ql-picker-item[data-value="huge"]::before {
        content: "32px";
    }

    .ql-snow .ql-picker.ql-header .ql-picker-label::before,
    .ql-snow .ql-picker.ql-header .ql-picker-item::before {
        content: "文本";
    }

    .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
    .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before {
        content: "标题1";
    }

    .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
    .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before {
        content: "标题2";
    }

    .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
    .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before {
        content: "标题3";
    }

    .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
    .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before {
        content: "标题4";
    }

    .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="5"]::before,
    .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="5"]::before {
        content: "标题5";
    }

    .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="6"]::before,
    .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="6"]::before {
        content: "标题6";
    }

    .ql-snow .ql-picker.ql-font .ql-picker-label::before,
    .ql-snow .ql-picker.ql-font .ql-picker-item::before {
        content: "标准字体";
    }

    .ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
    .ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before {
        content: "衬线字体";
    }

    .ql-snow .ql-picker.ql-font .ql-picker-label[data-value="monospace"]::before,
    .ql-snow .ql-picker.ql-font .ql-picker-item[data-value="monospace"]::before {
        content: "等宽字体";
    }
</style>
